| Black River | |
| Source1 Location: | Rathbaun Turlough |
| Mouth Location: | Atlantic Ocean at Galway Harbour via River Corrib |
| Subdivision Type1: | Country |
| Subdivision Name1: | Ireland |
| Length: | 28.57km (17.75miles) |
| Source1 Elevation: | 36m (118feet) |
| Tributaries Left: | Togher River, Kilshanvy River |
The Black River (Irish: An Abhainn Dubh;[1] OSI grid ref: [1]) is a river in Connacht in Ireland. For much of its length it forms the border between County Galway and County Mayo. It flows past Shrule, and drains into Lough Corrib.